docs: def clean_text(self, number, countries=None, country=None, **kwargs):
          """Parse a phone number and return in international format.
  
          If no valid phone number can be detected, None is returned. If
          a country code is supplied, this will be used to infer the
          prefix.
  
          https://github.com/daviddrysdale/python-phonenumbers
          """
          for code in self._clean_countries(countries, country):
              try:
                  num = parse_number(number, code)
                  if is_possible_number(num):
                      if is_valid_number(num):
                          return format_number(num, PhoneNumberFormat.E164)
              except NumberParseException:
                  pass